Microsoft launched a new build to the Windows 11 Insider Dev channel on Friday and with it comes a Game Pass ad in Settings.
Microsoft's announcement: "We are introducing a new Game Pass recommendation card on the Settings homepage. The Game Pass recommendation card on Settings Homepage will be shown to you if you actively play games on your PC. As a reminder – the Settings homepage will be shown only on the Home and Pro editions of Windows 11 and if you’re signed into Windows with your Microsoft account."
entire home tab is just ad space and can be disabled
or just upgrade to enterprise, comes with no ms 365 ads and the home tab is disabled out of the box.
you'll get literally zero ads or bs like onedrive in built-in apps, and even anti features like ms account login can be disabled (os will just skip right to local account creation)
if you're in the know, check out vlmcsd on github and "test" windows enterprise with KMS. It can run on everything from a pi, to docker, to openwrt. If you're really gangster, you can set up SRV records and get auto activation on your lan